CA1264289A - Flowline connection module - Google Patents
Flowline connection moduleInfo
- Publication number
- CA1264289A CA1264289A CA000502141A CA502141A CA1264289A CA 1264289 A CA1264289 A CA 1264289A CA 000502141 A CA000502141 A CA 000502141A CA 502141 A CA502141 A CA 502141A CA 1264289 A CA1264289 A CA 1264289A
- Authority
- CA
- Canada
- Prior art keywords
- pipework
- well
- connection structure
- subsea
- flowline connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 26
- 239000007924 injection Substances 0.000 claims abstract description 26
- 238000012769 bulk production Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000003032 molecular docking Methods 0.000 claims 3
- 241000191291 Abies alba Species 0.000 abstract description 20
- 235000004507 Abies alba Nutrition 0.000 description 18
- 238000005553 drilling Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 101150084216 thiB gene Proteins 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
- E21B43/017—Production satellite stations, i.e. underwater installations comprising a plurality of satellite well heads connected to a central station
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/08—Underwater guide bases, e.g. drilling templates; Levelling thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
- E21B43/013—Connecting a production flow line to an underwater well head
Abstract
FLOWLINE CONNECTION MODULE
ABSTRACT
Where a subsea well is completed for production or water injection service, a subsea christmas tree must sealably connect with both the wellhead and the pipeline(s) or subsea manifold template pipework in order that fluids may flow out of (or into) the well. An intermediate series of pipework loops mounted within a space frame, herein referred to as a Flowline Connection Module (FCM) is removably interposed between the subsea wellhead and the subsea christmas tree to facilitate the piping connections. Each of the modules is further provided with removable U-looped pipework spools at its extremities and said spools may contain adjustable chokes to control the flow of fluids into or out of the wells. The replacement of one choke spool with another may adapt the service function of the well from, for example, production to water injection.
ABSTRACT
Where a subsea well is completed for production or water injection service, a subsea christmas tree must sealably connect with both the wellhead and the pipeline(s) or subsea manifold template pipework in order that fluids may flow out of (or into) the well. An intermediate series of pipework loops mounted within a space frame, herein referred to as a Flowline Connection Module (FCM) is removably interposed between the subsea wellhead and the subsea christmas tree to facilitate the piping connections. Each of the modules is further provided with removable U-looped pipework spools at its extremities and said spools may contain adjustable chokes to control the flow of fluids into or out of the wells. The replacement of one choke spool with another may adapt the service function of the well from, for example, production to water injection.
Description
~i4~&'3 FLOWLINE CONNECTION MOD~LE
Subsea wells located on the seabed comprise well casings extending into the earth and a wellhead, being an extension of one of the casing ~trings, extending above seabed level.
10 For guideline drilling operations, there must be a gu~dance arrangement consisting of four vertical guide posts equi-spaced radially about the wellhead to which guidelines from an over-positioned floating drilling rig are attached. This system of guide wires and guide posts i8 used to guide blowout 15 preventers and, where applicable, subsea completion equipment such as subsea christmas trees from the rig onto the wellhead whence a sealable connection is made with the wellhead.
Where a single well is to be drilled into the seabed, the 20 above-mentioned guidance arrangement i6 usually supported from a guide base which is run with and connects onto the outermost and shortest casing string. If this single well were to be completed for production or water injection service, a subsea christmas tree may be run and sealably connected to the wellhead. A
25 pipeline (or pipelines) would then be sealably connected tQ the outlet(s) of the subsea christmas tree to permit the flow of fluids out of (or into) the well to ~or from) a surface-based production facility.
12~i4X~9
Subsea wells located on the seabed comprise well casings extending into the earth and a wellhead, being an extension of one of the casing ~trings, extending above seabed level.
10 For guideline drilling operations, there must be a gu~dance arrangement consisting of four vertical guide posts equi-spaced radially about the wellhead to which guidelines from an over-positioned floating drilling rig are attached. This system of guide wires and guide posts i8 used to guide blowout 15 preventers and, where applicable, subsea completion equipment such as subsea christmas trees from the rig onto the wellhead whence a sealable connection is made with the wellhead.
Where a single well is to be drilled into the seabed, the 20 above-mentioned guidance arrangement i6 usually supported from a guide base which is run with and connects onto the outermost and shortest casing string. If this single well were to be completed for production or water injection service, a subsea christmas tree may be run and sealably connected to the wellhead. A
25 pipeline (or pipelines) would then be sealably connected tQ the outlet(s) of the subsea christmas tree to permit the flow of fluids out of (or into) the well to ~or from) a surface-based production facility.
12~i4X~9
- 2 Where a plurality of wells is to be drilled from one general location on the seabed, it is often the case that a drilling template structure is used to support the above-mentioned guidance arrangement In this instance, the template is installed in advance of any drilling activity and wells are drilled through the template well slots one by one. If any of the individual wells were to be completed for production or water injection service, a subsea Christmas tree may be run and sealably connected to the wellhead.
In such an instance, it is generally the case that flow of fluids out of or into these wells is contrained and directed by pipework supported by the drilling template structure. ~t ,is also genera11y the case that the majority of this pipework is pre-installed in the template structure in advance of the structure being lowered to the seabed. This pipework will then be sealably connected to the outlets of the subsea Christmas tree(s) and a pipeline (or pipelines) will be sealably connected to the outlet(s) of the manifold pipework to permit the flow of fluids out of (or into) the wells to (or from) a surface-based production facility. Such an arrangement will hereafter be termed a Subsea Manifold Template (SMT). US
Patents 3,618,661 and 4,438,817 each disclose subsea well drilling apparatus which utilizes a template for accommodating a plurality of wells and which employs a retrievable pipework structure common to all the wells for communicating fluid flows between Christmas trees superimposed-on the respective wellheads and fluid flow lines communicating with a remote facility.
Generally it is not known in advance which wellslots will house production wells and which wellslots will house water injection wells. The manifold pipework arrangement is therefore generally designed to accol~70date either service to any wel1 slot.
With any subsea producing well, whether it is drilled individually from a guidebase or in ccmbination with others from 1~4~
a drill~ng template, there remains always the possibllity that ~uch a producing well may, at some later point in lts life, be required to be converted from it~ original fluid production service to that of a water injection service. It is therefore of advantage that pipelines or pipework to that well are able to accommodate the well in either production or water in~ection services.
If the reservoir energy of a subterranean hydroc~rbon reservoir 0 iB low, it may be necessary to in~ect water into certain ~trategic parts of that reseryoir to ensure that re6erYoir pressure is maintained. Where the SMT pipework arrangement i6 such that one single water injection supply line supplie6 a common header in the manifold, flow of water into individual 15 wells must be ad~usted by the use of chokes. A choke for controlling the flow of injection water into any well may be mounted in pipework in or around its well slot.
Where the SMT pipework arrangement i8 such that all producing 20 wells supply a common bulk header held at a fixed pressure, lt may be necessary to adjust the wellhead pressure of certain producing wells by the use of chokes. A choke for controlling the flow of hydrocarbon fluids from any well may be mounted in pipework in or around its wellslot.
Since it is required to connect the outlet(s) of any ~ubsea christmas tree to the pipelinets) tin the case of an individual subsea well) or to the SMT pipework (in the case of template-drilled wells) and these connections are required to be 1~4 made and broken each time the subsea chri6tmas tree is removed to work over the well, it i~ of advantage if the generally accepted method of utilising vertically oriented connector~ for coupling the outlets of said christma~ trees to the pipellne6 or pipework is employed.
When this is the case, the connections can be effected by downward motion of said chri6tmas tree as it lands and engage6 with the wellhead. To maXe a number of such pipework connections 1O external to the wellhead connector at the time sald chri6tmas tree i5 landed requires that a degree of ~tructural flexibillty be incorporated within the pipework system. One way of achieving this flexibility is to mount long intermediate pipework spool6 between the subsea chri6tma6 tree and the pipelines (in the case of an individual subsea well) or to the SMT plpework (in the ca6e of template-drilled wells) to hold said pipework spools on` a framework, which supports the vertically orientated connectors, so that they are provided with a degree of horizontal freedom and to interpose said framework and pipework spools between the 2a 6ubsea christmas tree and the guide base (in the case of an lndividual well) or the template framework (in the case of template-drilled wells).
By providing pipçwork loops to cover all possible service 25 functions (eg, bulk oil, production test, water injection and ga6 lift), the aforementioned system advantage of service flexibility can be achieved. Recoverable modularised pipework spools at the extremities of the interposed framework are designed to interconnect with different sections of the pipework arrangement;
1~i4X~
the service function of a well can thus be easily changed by replacing one modularised pipework spool with another. The modularised pipework spools are most advantageously designed to be replaced with 5 the subsea Christmas tree in place.
These modularised pipework spools serve as ideal locations to mount the aforementioned water injection, gas lift or production chokes, since they are located within each wellbay and the chokes can be readily serviced or replaced by recovering the spool.
An object of the invention is to provide a degree of pipework interchangeability so that the service function of a w~ll can be easily changed preferably without necessarily having to pull the subsea Christmas tree.
Another object of the invention is to provide a means of mounting chokes to control the flow of fluids into or out of each well and to allow these chokes to be serviced or replaced preferably without having to pull the subsea tree.
A further object of the invention is to provide a convenient means of connection of a subsea manifold template pipework or pipelines to the subsea Christmas tree outlet(s).
A yet further object of the invention is to provide a degree of structural flexibility in the pipework to allow any of the system's subsea Christmas trees to make the required sealable connections.
It is a further object of the invention to achieve each of the above-mentioned objects or combinations thereof with a modular construction which i5 able to be installed easily in a subsea environment with the use of divers.
In such an instance, it is generally the case that flow of fluids out of or into these wells is contrained and directed by pipework supported by the drilling template structure. ~t ,is also genera11y the case that the majority of this pipework is pre-installed in the template structure in advance of the structure being lowered to the seabed. This pipework will then be sealably connected to the outlets of the subsea Christmas tree(s) and a pipeline (or pipelines) will be sealably connected to the outlet(s) of the manifold pipework to permit the flow of fluids out of (or into) the wells to (or from) a surface-based production facility. Such an arrangement will hereafter be termed a Subsea Manifold Template (SMT). US
Patents 3,618,661 and 4,438,817 each disclose subsea well drilling apparatus which utilizes a template for accommodating a plurality of wells and which employs a retrievable pipework structure common to all the wells for communicating fluid flows between Christmas trees superimposed-on the respective wellheads and fluid flow lines communicating with a remote facility.
Generally it is not known in advance which wellslots will house production wells and which wellslots will house water injection wells. The manifold pipework arrangement is therefore generally designed to accol~70date either service to any wel1 slot.
With any subsea producing well, whether it is drilled individually from a guidebase or in ccmbination with others from 1~4~
a drill~ng template, there remains always the possibllity that ~uch a producing well may, at some later point in lts life, be required to be converted from it~ original fluid production service to that of a water injection service. It is therefore of advantage that pipelines or pipework to that well are able to accommodate the well in either production or water in~ection services.
If the reservoir energy of a subterranean hydroc~rbon reservoir 0 iB low, it may be necessary to in~ect water into certain ~trategic parts of that reseryoir to ensure that re6erYoir pressure is maintained. Where the SMT pipework arrangement i6 such that one single water injection supply line supplie6 a common header in the manifold, flow of water into individual 15 wells must be ad~usted by the use of chokes. A choke for controlling the flow of injection water into any well may be mounted in pipework in or around its well slot.
Where the SMT pipework arrangement i8 such that all producing 20 wells supply a common bulk header held at a fixed pressure, lt may be necessary to adjust the wellhead pressure of certain producing wells by the use of chokes. A choke for controlling the flow of hydrocarbon fluids from any well may be mounted in pipework in or around its wellslot.
Since it is required to connect the outlet(s) of any ~ubsea christmas tree to the pipelinets) tin the case of an individual subsea well) or to the SMT pipework (in the case of template-drilled wells) and these connections are required to be 1~4 made and broken each time the subsea chri6tmas tree is removed to work over the well, it i~ of advantage if the generally accepted method of utilising vertically oriented connector~ for coupling the outlets of said christma~ trees to the pipellne6 or pipework is employed.
When this is the case, the connections can be effected by downward motion of said chri6tmas tree as it lands and engage6 with the wellhead. To maXe a number of such pipework connections 1O external to the wellhead connector at the time sald chri6tmas tree i5 landed requires that a degree of ~tructural flexibillty be incorporated within the pipework system. One way of achieving this flexibility is to mount long intermediate pipework spool6 between the subsea chri6tma6 tree and the pipelines (in the case of an individual subsea well) or to the SMT plpework (in the ca6e of template-drilled wells) to hold said pipework spools on` a framework, which supports the vertically orientated connectors, so that they are provided with a degree of horizontal freedom and to interpose said framework and pipework spools between the 2a 6ubsea christmas tree and the guide base (in the case of an lndividual well) or the template framework (in the case of template-drilled wells).
By providing pipçwork loops to cover all possible service 25 functions (eg, bulk oil, production test, water injection and ga6 lift), the aforementioned system advantage of service flexibility can be achieved. Recoverable modularised pipework spools at the extremities of the interposed framework are designed to interconnect with different sections of the pipework arrangement;
1~i4X~
the service function of a well can thus be easily changed by replacing one modularised pipework spool with another. The modularised pipework spools are most advantageously designed to be replaced with 5 the subsea Christmas tree in place.
These modularised pipework spools serve as ideal locations to mount the aforementioned water injection, gas lift or production chokes, since they are located within each wellbay and the chokes can be readily serviced or replaced by recovering the spool.
An object of the invention is to provide a degree of pipework interchangeability so that the service function of a w~ll can be easily changed preferably without necessarily having to pull the subsea Christmas tree.
Another object of the invention is to provide a means of mounting chokes to control the flow of fluids into or out of each well and to allow these chokes to be serviced or replaced preferably without having to pull the subsea tree.
A further object of the invention is to provide a convenient means of connection of a subsea manifold template pipework or pipelines to the subsea Christmas tree outlet(s).
A yet further object of the invention is to provide a degree of structural flexibility in the pipework to allow any of the system's subsea Christmas trees to make the required sealable connections.
It is a further object of the invention to achieve each of the above-mentioned objects or combinations thereof with a modular construction which i5 able to be installed easily in a subsea environment with the use of divers.
3~
12~4;~
The invention provides a flowline connection structure for a subsea well assembly comprising at least one well head including discrete passages therein for conducting fluids to and from the well during either a production or a liquid injection phase of its operation, a base structure supported on the ocean floor to encompass one, or a plurality of, well heads, at least one flow control subsea tree detachably engagable with the base structure for regulating fluid flows passing into and out of the, or a respective, well, and pipelines comm~nicating with remote1y 10cated means for ho~ding well fluids and having access connectors adjacent said base structure which are connected to said subsea tree by the flowline connection structure removably mounted on the base structure, characterized in that the flowline connection structure has fluid flow pipework thereon defining flow paths for well fluids to pass therethrough in different modes of operation of the associated well in eith~r the production or injection function thereof, and including separate pipework sections which can be removably mounted on the flo~line connection structure to complete the flow paths required for a selected mode of operation.
.. . ..
1~i4~9 Embodiments of the invention will now be described by way of example and with reference to the accompanying drawings, in which:-Figure 1 is a perspective view of a wellhead drilling assembly incorporating a flowline connectionmodule (FCM) according to the invention;
Figure 2 is a perspective view, partly broken away, of a flowline connection module according to the invention for use in a subsea manifold template;
Figure 3 is a perspective view of an FCM arranged for gas lifted production on satellite wells;
Figure 4 is a perspective view of an FCM arranged for choke controlled prod~ction service on satellite wells;
Figure 5 is a perspective view ~f an FCM arranged for water injection service on satellite wells;
Figure 6 is a perspective view of an FCM arranged for gas lifted production service on template wells;
Figure 7 is a perspective view of an FCM arranged for choke controlled production service on template wells; and Figure 8 is a perspective view of an FCM arranged for water injection service on template wells.
12~4;~
The invention provides a flowline connection structure for a subsea well assembly comprising at least one well head including discrete passages therein for conducting fluids to and from the well during either a production or a liquid injection phase of its operation, a base structure supported on the ocean floor to encompass one, or a plurality of, well heads, at least one flow control subsea tree detachably engagable with the base structure for regulating fluid flows passing into and out of the, or a respective, well, and pipelines comm~nicating with remote1y 10cated means for ho~ding well fluids and having access connectors adjacent said base structure which are connected to said subsea tree by the flowline connection structure removably mounted on the base structure, characterized in that the flowline connection structure has fluid flow pipework thereon defining flow paths for well fluids to pass therethrough in different modes of operation of the associated well in eith~r the production or injection function thereof, and including separate pipework sections which can be removably mounted on the flo~line connection structure to complete the flow paths required for a selected mode of operation.
.. . ..
1~i4~9 Embodiments of the invention will now be described by way of example and with reference to the accompanying drawings, in which:-Figure 1 is a perspective view of a wellhead drilling assembly incorporating a flowline connectionmodule (FCM) according to the invention;
Figure 2 is a perspective view, partly broken away, of a flowline connection module according to the invention for use in a subsea manifold template;
Figure 3 is a perspective view of an FCM arranged for gas lifted production on satellite wells;
Figure 4 is a perspective view of an FCM arranged for choke controlled prod~ction service on satellite wells;
Figure 5 is a perspective view ~f an FCM arranged for water injection service on satellite wells;
Figure 6 is a perspective view of an FCM arranged for gas lifted production service on template wells;
Figure 7 is a perspective view of an FCM arranged for choke controlled production service on template wells; and Figure 8 is a perspective view of an FCM arranged for water injection service on template wells.
4~9 Towards achieving the foregoing ob~ectives, the hereinaft~r disclosed invention, the 'Flowline connection Module' is 6hown ln its operational position in Figures 1 and 2. Figure 1 shows a Flo~"~line Connection ~,odule ~40) (hereinafter referred to as an FCM) in position between the permanent guide base (41) a~ld t~e wellhead (42) of an individual subsea satellite well. Such a variation in the form of the invention shall hereinafter be referred to a~ a 'Satellite FCM'. Figure 2 shoes an fCM (40) in position on a ~ubsea manifold '~er;,~la~,e (43). Such a variation in the form of the invention ~hall 10 hereinafter be referred to as a 'Template FCMI.
Figure 1 indicates a subsea satellite well which will be ueed to produce oil and gas back to a pipework manifold arrangement positioned on the seabed some distance away from the satellite 15 well. Oil, gas (and possibly water) from like satellite wells will be co-mingled at the seabed manifold, whence the fluids will flow to a surface-based production facility where the produced oil, water and gas will be separated.
20 The satellite well shown in Figure 1 will have relatively low energy and will have a low gas/oil ratio. Therefore, to assist the flow of oil from the well to the seabed manifold, gas will be bubbled into the production tubing of the well at a point deep in the well and the oil will be 'gas lifted' to the surface.
In order occasionally to meter the flow of fluids from such a satellite well, it will be necessary to divert its flow from the pipeline containing the co-mingled flow of all satellite wells (the 'bulk productlon' pipeline) and to redirect lts flow into a separate 'production test' pipeline.
If, therefore, the well normally flows along a 'bulk productlon' flowline (44) to the seabed manifold; if the flow diversion from 'bulk production' to ~production test~ takes place at the satellite well~ite: and if the satellite well requires gas for gas lifting the well, the well mu6t be connected to the seabed manifold by three flowlines, one flowline (44,45,46) for each of the 'bulk production', 'production test' and 'gas lift' services. The three flowlines connect with horizontal sections of the Satellite FCM pipework at the flange connections respectively indicated by (l, 2 and 3) in Figure 3.
The flow of fluids into and out of the well i6 controlled by a valve arrangement sealably connected to the wellhead at the seabed. Su~,~, an arrangement is ~nown as a subs~a Chris~mas tre~ (47~.
It is of advantage if the 'bulk production' and 'production test' outlets and the 'gas lift' inlet to the subsea christmas tree are connected to the FCM pipework by utilising vertically orientated connectors to facilitate removal and reconnection of the subsea 25 christmas tree during a workover of the well. These connectors are shown respectively by(4, 5 and 6)in Figure 3. To ensure that the connection between subsea christmas tree and FCM pipèwork can 12~i4;~8~
- 1 o be ~uccessfully and repeatably effected (possibly with different replacement subsea christma6 trees), the connectors(4, 5 and 6) must be allowed to 'float' both l~terally and axially. To achieve this 'float' in the connectors, a degree of structural flexibility must be introduced into the sy3tem and thiB iB
provided by the relatively long pipework loops between the flange connections(l, 2 and 3)and the connectors(4, 5 and 6).
The FCM pipework ls supported by a structural space frame (7) which locates the FCM assembly centrally about the wellhead and engages the four guide posts by means of a plurality of guide funnels (8) to achieve correct radial orientation.
Where the seabed manifold arrangement is such that one single gas supply pipeline supplie6 a common header in the manifold and where this common header supplies gas to more than one sub6ea well for the purpose of gas liftlng these wells, the flow of gas into an individual well must be controlled by the use of a choke.
The FCM pipework arrangement indicated in Figure 3 includes a choke (9) in the gas lift line for such a purpose. The choke is designed to form part of a U-looped pipework spool (10) with downward facing flange connections (11 and 12) which connect with ~and therefore form part of) the FCM gas lift pipework.
The U-looped gas lift choke spool (13) is supported by a structural framework (14) which is used to guide the spool's flanges (11 and 12) into an elevated position above the FCN gas lift plpework flanges (15 and 16) whence a jacking mechànism within the framework (14) allows the spool to be moved vertically 1~4~&9 and laterally relative to the frame to effect a controlled flange-to-flange make-up.
The ga6 lift choke spool ia mounted at an extremity of the FCM
and is designed to be able to run vertlcally past the 6ub6ea christmas tree when the tree is in position on the wellhead should it be required to service or replace the choke.
A similar U-looped spool (17) is indicated in Figure 3 forming 10 part of the FCM 'bulX production ' pipework. As with the ga~ lit choke spool (13) ~ this ~production change~ut~ 6pool (17~ is supported in a modularised framework and i~ able to run past the subsea christmas tree when the tree i6 in position on the wellhead. The purpose of the production changeout 6pool (17) will be described later.
Figure 4 indicates a variation of a Satellite F M which might be installed on a satellite well having relatively high energy and which would provide a normally flowing wellhead pressure in 20 excess of the operating pressure of the 'bulk production' header and 'bulk production' pipeline associated with the seabed manifold~ In this case, the wellhead pressure must be reduced to that of the bulk production header by choking the flow at the well. The FCM pipework arrangement indicated in Figure 4 25 includes a choke (18) in the bulk production pipework for such a purpose. In a similar manner to the gas lift choke spool (13), the production choXe 6pool (13) is designed to form part of a U-looped pipework spool ~upported by a structural framework whirh is used to guide and support the spool to allow it to effect a l.Z~i4~
controlled flange-to-flange make-up with the bulk productlon pipework.
No gas lift choke spool is required for such a well and, therefore, the ga6 lift pipework flanges (15 and 16) remain unconnected.
Comparison of Figures 3 and 4 indicates that the production choke spool and the production changeout ~pool are connected to the ame flanges (20 and 21) in the FCMIs bul~ production pipework.
Therefore, ~hould the wellhead pressure of the originally relatively high energy well decrease with time 6uch that its wellhead pressure at some point equals that of the bulk production header, there will no longer be a need for the 15 production choke and the production choke spool (19) could be replaced by the production changeout 6pool (17). The characteri~tics of the produced fluids may be ~uch that flow from the well could be enhanced by gas-lifting the well and a gas lift choke spool could be connected to flanges 15 and 16 and the FCM
20 variation revert~ to that configuration indicated by ~igure 3.
Figure 5 indicates a variation of a Satellite ~CM which might be installed on a satellite well used for water injection to maintain the reservoir pressure. A pipeline from a nearby 25 platform or SMT will connect with the FCN water injection pipework at flange (22) and water will enter the subsea tree (and hence the well) through tree/FC~ connector (6) via the water injectlon choke spool (23). Flow of water into the well ls controlled by varying the 6etting of the water injection choke -.. .. . ..
~ 4 (24). The water injectlon cho~e ~pool compri~e6 a U-looped pipework spool supported by a structural framework which i6 used to guide and support the spool to allow it to e~fect a controlled flange-to-flange make-up with the FCM water injection pipework in a similar manner to the production choke spool (19)~ Water injection choke spool flanges (26 and 27) mate respectively with the FCM water injection pipework flanges (20 and 25).
No production or gas lift choke spools are installed on the FCM
10 whe~ in the water injection mode a~d, therefore, flanges (15~, (16) and ~21) remain unconnected.' By comparing Figures 3, 4 and 5, it can be seen that a producing well is able to be converted to water injection service by simply replacing one choke spool with another. The choke spools are positioned outside the plan envelope of the subsea tree and so the choXe spools can be removed and replaced without having to kill the well and remove the subsea tree. Similarly, a subsea tree can be removed during a workover without having to remove 20 the choke spools and, since the tree/FCM interface is a simple vertical connection, reinstatement of pipework integrity following a workover is a time-efficient process. It has been shown that a S~tellite FCM can be equipped with different choke spools to permit use in different service functions. In a 25 similar manner, a Template FCM can be equipped with the same interchangeable choke spools (13, 17, 19 and 23) to allow, the same service flexibility from an SMT. The three Template FCN
arrangements for gas-lifted production service, choke-controlled 12~i4;~
production service and water in;ection service are shown in Figures 6, 7 and 8.
The Template FCM pipework permits identical subsea chrlstma6 tree/FCM interfaces to the Satellite FCM (4, 5 and 6) and therefore the same christmas trees can be used interchangeably ln both Template and Satellite applications.
As with the Satellite FCM, the Template FCM bulk production, 1O production test, water injection and gas lift pipework runs (28, 29, 28 and 30 respectively) are'supported by a structural ~pace frame (31) which locates the FCM assembly centrally about the wellhead and ~nga~es t.'~ four guid~ posts (56) by r;:eans of ~ plurality of guide funnels ~8) ~o achieve correct radial orientation. In the 15 case of the Template FCM, however, the terminations o~ the FCM
pipework runs have their central axes vertical (as opposed to the Satellite FCM where they are horizontal) so that a vertical flange-to-flange make-up can be achieved between Template FCM
pi,,~ ork an~ S.~T ?i~Pwor~ (50~. The Template FCM is lowered such that 20 the pipework flanges (12, 27, 32, 33 and/or 34) are in an elevated position relative to the mating SMT flanges, whence a jacking mechanism within the FCM framework (31) allows the FCM to be lowered vertically relative to the SMT to effect a controlled flange-to-flange make-up.
Figure 1 indicates a subsea satellite well which will be ueed to produce oil and gas back to a pipework manifold arrangement positioned on the seabed some distance away from the satellite 15 well. Oil, gas (and possibly water) from like satellite wells will be co-mingled at the seabed manifold, whence the fluids will flow to a surface-based production facility where the produced oil, water and gas will be separated.
20 The satellite well shown in Figure 1 will have relatively low energy and will have a low gas/oil ratio. Therefore, to assist the flow of oil from the well to the seabed manifold, gas will be bubbled into the production tubing of the well at a point deep in the well and the oil will be 'gas lifted' to the surface.
In order occasionally to meter the flow of fluids from such a satellite well, it will be necessary to divert its flow from the pipeline containing the co-mingled flow of all satellite wells (the 'bulk productlon' pipeline) and to redirect lts flow into a separate 'production test' pipeline.
If, therefore, the well normally flows along a 'bulk productlon' flowline (44) to the seabed manifold; if the flow diversion from 'bulk production' to ~production test~ takes place at the satellite well~ite: and if the satellite well requires gas for gas lifting the well, the well mu6t be connected to the seabed manifold by three flowlines, one flowline (44,45,46) for each of the 'bulk production', 'production test' and 'gas lift' services. The three flowlines connect with horizontal sections of the Satellite FCM pipework at the flange connections respectively indicated by (l, 2 and 3) in Figure 3.
The flow of fluids into and out of the well i6 controlled by a valve arrangement sealably connected to the wellhead at the seabed. Su~,~, an arrangement is ~nown as a subs~a Chris~mas tre~ (47~.
It is of advantage if the 'bulk production' and 'production test' outlets and the 'gas lift' inlet to the subsea christmas tree are connected to the FCM pipework by utilising vertically orientated connectors to facilitate removal and reconnection of the subsea 25 christmas tree during a workover of the well. These connectors are shown respectively by(4, 5 and 6)in Figure 3. To ensure that the connection between subsea christmas tree and FCM pipèwork can 12~i4;~8~
- 1 o be ~uccessfully and repeatably effected (possibly with different replacement subsea christma6 trees), the connectors(4, 5 and 6) must be allowed to 'float' both l~terally and axially. To achieve this 'float' in the connectors, a degree of structural flexibility must be introduced into the sy3tem and thiB iB
provided by the relatively long pipework loops between the flange connections(l, 2 and 3)and the connectors(4, 5 and 6).
The FCM pipework ls supported by a structural space frame (7) which locates the FCM assembly centrally about the wellhead and engages the four guide posts by means of a plurality of guide funnels (8) to achieve correct radial orientation.
Where the seabed manifold arrangement is such that one single gas supply pipeline supplie6 a common header in the manifold and where this common header supplies gas to more than one sub6ea well for the purpose of gas liftlng these wells, the flow of gas into an individual well must be controlled by the use of a choke.
The FCM pipework arrangement indicated in Figure 3 includes a choke (9) in the gas lift line for such a purpose. The choke is designed to form part of a U-looped pipework spool (10) with downward facing flange connections (11 and 12) which connect with ~and therefore form part of) the FCM gas lift pipework.
The U-looped gas lift choke spool (13) is supported by a structural framework (14) which is used to guide the spool's flanges (11 and 12) into an elevated position above the FCN gas lift plpework flanges (15 and 16) whence a jacking mechànism within the framework (14) allows the spool to be moved vertically 1~4~&9 and laterally relative to the frame to effect a controlled flange-to-flange make-up.
The ga6 lift choke spool ia mounted at an extremity of the FCM
and is designed to be able to run vertlcally past the 6ub6ea christmas tree when the tree is in position on the wellhead should it be required to service or replace the choke.
A similar U-looped spool (17) is indicated in Figure 3 forming 10 part of the FCM 'bulX production ' pipework. As with the ga~ lit choke spool (13) ~ this ~production change~ut~ 6pool (17~ is supported in a modularised framework and i~ able to run past the subsea christmas tree when the tree i6 in position on the wellhead. The purpose of the production changeout 6pool (17) will be described later.
Figure 4 indicates a variation of a Satellite F M which might be installed on a satellite well having relatively high energy and which would provide a normally flowing wellhead pressure in 20 excess of the operating pressure of the 'bulk production' header and 'bulk production' pipeline associated with the seabed manifold~ In this case, the wellhead pressure must be reduced to that of the bulk production header by choking the flow at the well. The FCM pipework arrangement indicated in Figure 4 25 includes a choke (18) in the bulk production pipework for such a purpose. In a similar manner to the gas lift choke spool (13), the production choXe 6pool (13) is designed to form part of a U-looped pipework spool ~upported by a structural framework whirh is used to guide and support the spool to allow it to effect a l.Z~i4~
controlled flange-to-flange make-up with the bulk productlon pipework.
No gas lift choke spool is required for such a well and, therefore, the ga6 lift pipework flanges (15 and 16) remain unconnected.
Comparison of Figures 3 and 4 indicates that the production choke spool and the production changeout ~pool are connected to the ame flanges (20 and 21) in the FCMIs bul~ production pipework.
Therefore, ~hould the wellhead pressure of the originally relatively high energy well decrease with time 6uch that its wellhead pressure at some point equals that of the bulk production header, there will no longer be a need for the 15 production choke and the production choke spool (19) could be replaced by the production changeout 6pool (17). The characteri~tics of the produced fluids may be ~uch that flow from the well could be enhanced by gas-lifting the well and a gas lift choke spool could be connected to flanges 15 and 16 and the FCM
20 variation revert~ to that configuration indicated by ~igure 3.
Figure 5 indicates a variation of a Satellite ~CM which might be installed on a satellite well used for water injection to maintain the reservoir pressure. A pipeline from a nearby 25 platform or SMT will connect with the FCN water injection pipework at flange (22) and water will enter the subsea tree (and hence the well) through tree/FC~ connector (6) via the water injectlon choke spool (23). Flow of water into the well ls controlled by varying the 6etting of the water injection choke -.. .. . ..
~ 4 (24). The water injectlon cho~e ~pool compri~e6 a U-looped pipework spool supported by a structural framework which i6 used to guide and support the spool to allow it to e~fect a controlled flange-to-flange make-up with the FCM water injection pipework in a similar manner to the production choke spool (19)~ Water injection choke spool flanges (26 and 27) mate respectively with the FCM water injection pipework flanges (20 and 25).
No production or gas lift choke spools are installed on the FCM
10 whe~ in the water injection mode a~d, therefore, flanges (15~, (16) and ~21) remain unconnected.' By comparing Figures 3, 4 and 5, it can be seen that a producing well is able to be converted to water injection service by simply replacing one choke spool with another. The choke spools are positioned outside the plan envelope of the subsea tree and so the choXe spools can be removed and replaced without having to kill the well and remove the subsea tree. Similarly, a subsea tree can be removed during a workover without having to remove 20 the choke spools and, since the tree/FCM interface is a simple vertical connection, reinstatement of pipework integrity following a workover is a time-efficient process. It has been shown that a S~tellite FCM can be equipped with different choke spools to permit use in different service functions. In a 25 similar manner, a Template FCM can be equipped with the same interchangeable choke spools (13, 17, 19 and 23) to allow, the same service flexibility from an SMT. The three Template FCN
arrangements for gas-lifted production service, choke-controlled 12~i4;~
production service and water in;ection service are shown in Figures 6, 7 and 8.
The Template FCM pipework permits identical subsea chrlstma6 tree/FCM interfaces to the Satellite FCM (4, 5 and 6) and therefore the same christmas trees can be used interchangeably ln both Template and Satellite applications.
As with the Satellite FCM, the Template FCM bulk production, 1O production test, water injection and gas lift pipework runs (28, 29, 28 and 30 respectively) are'supported by a structural ~pace frame (31) which locates the FCM assembly centrally about the wellhead and ~nga~es t.'~ four guid~ posts (56) by r;:eans of ~ plurality of guide funnels ~8) ~o achieve correct radial orientation. In the 15 case of the Template FCM, however, the terminations o~ the FCM
pipework runs have their central axes vertical (as opposed to the Satellite FCM where they are horizontal) so that a vertical flange-to-flange make-up can be achieved between Template FCM
pi,,~ ork an~ S.~T ?i~Pwor~ (50~. The Template FCM is lowered such that 20 the pipework flanges (12, 27, 32, 33 and/or 34) are in an elevated position relative to the mating SMT flanges, whence a jacking mechanism within the FCM framework (31) allows the FCM to be lowered vertically relative to the SMT to effect a controlled flange-to-flange make-up.
Claims (15)
1. A flowline connection structure for a subsea well assembly comprising at least one well head including discrete passages therein for conducting fluids to and from the well during either a production or a liquid injection phase of its operation, a base structure supported on the ocean floor to encompass one, or a plurality of, well heads, at least one flow control subsea tree detachably engagable with the base structure for regulating fluid flows passing into and out of the, or a respective, well, and pipelines communicating with remotely located means for holding well fluids and having access connectors adjacent said base structure which are connected to said subsea tree by the flowline connection structure removably mounted on the base structure, wherein the flowline connection structure has fluid flow pipework thereon defining flow paths for well fluids to pass therethrough in different modes of operation of the associated well in either the production or injection function thereof, and including separate pipework sections which can be selectively mounted on the flowline connection structure to be detachably engaged with discrete segments of said fluid flow pipework so as to complete flow paths specifically adapted for respective different modes of operation of the associated well.
2. A flowline connection structure according to Claim 1 wherein the separate sections of said pipework are locatable on the flowline connector structure at positions to allow them to be installed or removed without necessitating the removal of said subsea tree mounted thereon.
3. A flowline connection structure according to Claim 1 in the form of a module adapted to removably engage the, or a respective, well head and including means for centrally registering therewith.
4. A flowline connection structure according to Claim 3 wherein said pipework defines a plurality of flow paths for passing into or out of the respective well, bulk production fluids, gas lift gas and water injection fluids, and each flow path is rendered operable by connection therein of one of said separate sections adapted for a required flow through that flow path.
5. A flowline connection structure according to any of Claims 1 - 3, wherein said pipework further defines a flow path for production fluids in a production test mode of operation.
6. A flowline connection structure according to any of Claims 3 - 4 in the form of a module for use on a satellite well and comprising a plurality of laterally outwardly facing flanged terminal connector pieces associated with said flow paths for sealably connecting with respective subsea pipelines.
7. A flowline connection structure according to Claim 3 in the form of a module for use on a respective wellhead of a subsea well template and comprising a plurality of downwardly-facing flanged terminal connector pieces associated with said flow paths for sealably connecting with respective pipework manifolding provided on the template.
8. A flowline connection structure according to Claim 1 , wherein each removable section comprises a generally inverted U-shape pipework spool having downwardly-facing flanged terminal portions for connection to a pair of upwardly-facing flanged terminal portions of other sections of said pipework, or for connection to an upwardly-facing flanged terminal portion of another section of said pipework and an upwardly-facing flanged terminal portion of pipework provided on a subsea well template.
9. A flowline connection structure according to any of Claims 1 - 3, wherein a flow control choke is provided in at least one of the separate sections.
10. A flowline connection structure according to Claim 8, including a structural framework for supporting a pipework spool to guide it into an elevated position above the pipework with which it is to be connected.
11. A flowline connection structure according to Claim 10, including a jacking mechanism within said framework, adapted to allow the spool to be moved vertically and laterally relative to the framework to enable a controlled flange-to-flange connection to be effected.
12. A flowline connection structure according to any of Claims 1 to 3 in the form of a module comprising a docking port, and a plurality of guide sleeves spaced outwardly of the docking port, each guide sleeve defining a substantially vertically aligned passage for engaging a substantially vertical guide piece on the aforesaid base structure for registering said docking port with the respective well head.
13. A flowline connection structure according to Claim 1 , wherein said flow paths communicate with upwardly facing fluid receptacles for sealably registering with respective downwardly projecting nozzles provided on the respective subsea tree.
14. A flowline connection structure according to Claim 13, wherein said pipework is provided by elongate pipework loops which have a degree of structural flexibility allowing lateral and axial movement of the upwardly-facing fluid receptacles to assist mating of said nozzles therewith.
15. A subsea well assembly including a base structure encompassing at least one wellhead, and a subsea tree, and a flowline connection structure as claimed in any of Claims 1 to 3, associated with the, or a respective, wellhead.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8505327 | 1985-01-03 | ||
| GB858505327A GB8505327D0 (en) | 1985-03-01 | 1985-03-01 | Subsea well head template |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1264289A true CA1264289A (en) | 1990-01-09 |
Family
ID=10575287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000502141A Expired - Fee Related CA1264289A (en) | 1985-03-01 | 1986-02-19 | Flowline connection module |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4832124A (en) |
| CA (1) | CA1264289A (en) |
| DE (1) | DE3606083A1 (en) |
| DK (1) | DK95486A (en) |
| GB (2) | GB8505327D0 (en) |
| NL (1) | NL8600510A (en) |
| NO (1) | NO860724L (en) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8707303D0 (en) * | 1987-03-26 | 1987-04-29 | British Petroleum Co Plc | Underwater saddle |
| IT1215962B (en) * | 1988-03-02 | 1990-02-22 | Tecnomare S P A San Marco Vene | SAFETY SUBMARINE VALVE BLOCK, PARTICULARLY SUITABLE FOR RISERS OF OFFSHORE PLATFORMS. |
| US5088556A (en) * | 1990-08-01 | 1992-02-18 | Fmc Corporation | Subsea well guide base running tool |
| US5069287A (en) * | 1990-08-01 | 1991-12-03 | Fmc Corporation | Retrievable guide base for subsea well |
| BR9005132A (en) * | 1990-10-12 | 1992-04-14 | Petroleo Brasileiro Sa | SUBMARINE CONNECTION SYSTEM AND ACTIVE CONNECTOR USED IN THIS SYSTEM |
| BR9103429A (en) * | 1991-08-09 | 1993-03-09 | Petroleo Brasileiro Sa | SATELLITE TREE MODULE AND STRUCTURE OF FLOW LINES FOR INTERCONNECTING A SATELLITE POCO TO A SUBMARINE PRODUCTION SYSTEM |
| BR9103428A (en) * | 1991-08-09 | 1993-03-09 | Petroleo Brasileiro Sa | WET CHRISTMAS TREE |
| NO307309B1 (en) * | 1997-11-03 | 2000-03-13 | Kongsberg Offshore As | Method and apparatus for mounting a seabed installation |
| EP1151178A1 (en) * | 1999-02-11 | 2001-11-07 | Fmc Corporation | Subsea completion apparatus |
| GB0020460D0 (en) * | 2000-08-18 | 2000-10-11 | Alpha Thames Ltd | A system suitable for use on a seabed and a method of installing it |
| US6742594B2 (en) * | 2002-02-06 | 2004-06-01 | Abb Vetco Gray Inc. | Flowline jumper for subsea well |
| NO318212B1 (en) * | 2003-01-14 | 2005-02-21 | Vetco Aibel As | Underwater recovery device |
| AU2004289864B2 (en) * | 2003-05-31 | 2011-02-10 | Onesubsea Ip Uk Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
| BRPI0508049B8 (en) * | 2004-02-26 | 2016-10-11 | Cameron Systems Ireland Ltd | submerged flow interface equipment connection system |
| GB2429990A (en) * | 2005-09-07 | 2007-03-14 | Keron Engineering Ltd | Drilling guide frame assembly |
| WO2007108672A1 (en) * | 2006-03-22 | 2007-09-27 | Itrec B.V. | Pre-assembly of a subsea base and pipeline |
| GB0618001D0 (en) * | 2006-09-13 | 2006-10-18 | Des Enhanced Recovery Ltd | Method |
| GB0625191D0 (en) * | 2006-12-18 | 2007-01-24 | Des Enhanced Recovery Ltd | Apparatus and method |
| GB0625526D0 (en) * | 2006-12-18 | 2007-01-31 | Des Enhanced Recovery Ltd | Apparatus and method |
| US8430168B2 (en) * | 2008-05-21 | 2013-04-30 | Valkyrie Commissioning Services, Inc. | Apparatus and methods for subsea control system testing |
| US20130000918A1 (en) * | 2011-06-29 | 2013-01-03 | Vetco Gray Inc. | Flow module placement between a subsea tree and a tubing hanger spool |
| CN106150418B (en) * | 2015-04-13 | 2021-09-14 | 长春工业大学 | Wellhead butt joint device and butt joint method thereof |
| GB2576837B (en) * | 2015-08-05 | 2020-06-03 | Aquaterra Energy Ltd | Cartridge and method of carrying out abandonment operations |
| NO343099B1 (en) * | 2016-12-21 | 2018-11-05 | Fmc Kongsberg Subsea As | First subsea structure with guiding groove for mating with second subsea structure, and assembly comprising the first and second subsea structures |
| GB201622129D0 (en) | 2016-12-23 | 2017-02-08 | Statoil Petroleum As | Subsea assembly modularisation |
| GB2586620A (en) * | 2019-08-29 | 2021-03-03 | Aker Solutions As | Adapter assembly, flowline connector assembly and subsea production system |
| US11840907B2 (en) | 2019-11-13 | 2023-12-12 | Fmc Kongsberg Subsea As | Module, a system and a method for daisy chaining of satellite wells |
| NO20200699A1 (en) * | 2019-11-13 | 2021-05-14 | Fmc Kongsberg Subsea As | A module, a system and a method for daisy chaining of satellite wells |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3618661A (en) * | 1969-08-15 | 1971-11-09 | Shell Oil Co | Apparatus and method for drilling and producing multiple underwater wells |
| US3633667A (en) * | 1969-12-08 | 1972-01-11 | Deep Oil Technology Inc | Subsea wellhead system |
| US4036295A (en) * | 1976-04-22 | 1977-07-19 | Armco Steel Corporation | Method and apparatus for connecting flowlines to underwater installations |
| US4120362A (en) * | 1976-11-22 | 1978-10-17 | Societe Nationale Elf Aquitaine (Production) | Subsea station |
| US4192383A (en) * | 1978-05-02 | 1980-03-11 | Armco Inc. | Offshore multiple well drilling and production apparatus |
| US4625806A (en) * | 1979-09-26 | 1986-12-02 | Chevron Research Company | Subsea drilling and production system for use at a multiwell site |
| US4438817A (en) * | 1982-09-29 | 1984-03-27 | Armco Inc. | Subsea well with retrievable piping deck |
-
1985
- 1985-03-01 GB GB858505327A patent/GB8505327D0/en active Pending
-
1986
- 1986-02-12 GB GB08603452A patent/GB2171736B/en not_active Expired
- 1986-02-19 CA CA000502141A patent/CA1264289A/en not_active Expired - Fee Related
- 1986-02-26 DE DE19863606083 patent/DE3606083A1/en not_active Withdrawn
- 1986-02-27 NO NO860724A patent/NO860724L/en unknown
- 1986-02-28 DK DK95486A patent/DK95486A/en not_active Application Discontinuation
- 1986-02-28 NL NL8600510A patent/NL8600510A/en not_active Application Discontinuation
-
1987
- 1987-12-17 US US07/134,127 patent/US4832124A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2171736B (en) | 1988-06-02 |
| DK95486A (en) | 1986-09-02 |
| GB2171736A (en) | 1986-09-03 |
| DE3606083A1 (en) | 1986-09-18 |
| NL8600510A (en) | 1986-10-01 |
| GB8505327D0 (en) | 1985-04-03 |
| DK95486D0 (en) | 1986-02-28 |
| US4832124A (en) | 1989-05-23 |
| NO860724L (en) | 1986-09-02 |
| GB8603452D0 (en) | 1986-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1264289A (en) | Flowline connection module | |
| EP1724434B1 (en) | Universal tubing hanger suspension assembly and well completion system and method of using same | |
| US6942028B2 (en) | Slim-bore tubing hanger | |
| US4732215A (en) | Subsea oil production system | |
| US4438817A (en) | Subsea well with retrievable piping deck | |
| EP0907821B1 (en) | Christmas tree | |
| US4281716A (en) | Flexible workover riser system | |
| EP1151178A1 (en) | Subsea completion apparatus | |
| US20050205262A1 (en) | Subsea production systems | |
| GB2345504A (en) | Electric power pack for subsea wellhead hydraulic tools | |
| KR102639693B1 (en) | Subsea methane hydrate production | |
| GB2346630A (en) | A controls cap for subsea completions | |
| US20130168101A1 (en) | Vertical subsea tree assembly control | |
| GB2523695B (en) | Subsea completion with a tubing spool connection system | |
| CN111819338A (en) | Plug and play connection system for a controlled pressure drilling system below a tension ring | |
| US4721163A (en) | Subsea well head alignment system | |
| EP3935252B1 (en) | Tubing hanger system | |
| US6059039A (en) | Extendable semi-clustered subsea development system | |
| WO2005047639A2 (en) | Subsea completion system and method of using same | |
| WO2005042906A2 (en) | Subsea completion system, and methods of using same | |
| US20230392466A1 (en) | Barrier arrangement in wellhead assembly | |
| US20130098633A1 (en) | Recoverable production module for use with a production tree | |
| US5161620A (en) | Subsea production wellhead assembly | |
| CA1197180A (en) | Subsea wellhead connection assembly and a method of installing same | |
| NO20230846A1 (en) | Barrier arrangement in wellhead assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |